Bilateral Spastic Paresis (Holstein Heifer): Neurectomy

A Holstein heifer approximately 8 months old has shown progressive gait difficulty for several weeks, caused by bilateral spastic contracture of the gastrocnemius muscles. Due to hyperextension of the tibiotarsal joint, the animal has a stiff gait in the hind limbs ("wooden legs"), with short steps and a tendency to stand on its toes. At times, the back appears arched and the base of the tail raised.
Despite being aware of the hereditary nature of this condition, the owner opted to attempt functional recovery of the animal's motor activity. The decision was made to proceed with the neurectomy surgical technique.